Answer:
length
Explanation:
cm measures length. Think of a ruler.
It is an example of physical change. The molecules are not changing, so it is not chemical, and a physical property is something that a physical thing has.
81. There is 1 carbon, 2 chlorine and fluorine atoms in Freon 12. To draw them it forms a cross with C in the middle and Cl and F both on the opposite side.